Power-hammer.



No. 668,799. Patented Feb. 26, |90|., n. E. moan.

POWER HAMMER.

Application filed June 21, 1897.:

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No. 668,799. Patented Feb. 26, 190i.

- R.. E. KIDDER.

POWER HAMMER.

I (Application filed June 21, 1897.,

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Uivrrs AES RICHARD E. KIDDER, OF WORCESTER, MASSACHUSETTS.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 668,799, dated February 26, 1901.

Application filed June 2 l, 1 8 9 7.

To all whom, it may concern.-

Be it known that I, RICHARD E. KIDDER, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Improvement in Power-Hammers, of which the following is a specification, accompanied by drawings forming a part of the same, in which- Figure l is a side elevation of a power-hammer embodying my invention. Fig. 2 is a side view shown in central vertical sectional view. Fig. 3 is a side view of the lower portion of the framework,showing the side opposite that represented in Fig. 1; and Fig. 4 is an end view of the hammerhelve and clampingblock.

Similar letters refer to similar parts in the different figures.

My invention relates to that class of power-- hammers which comprise a pivoted helve and a vertically-reciprocating hammer connected with the helve by a flexible connection; and it has for its objects to provide improved means for varying the tension of the flexible connection between the hammer and the helve, to vary the stroke of the ham mer-head, to .vertically adjust the same, and to increase the efficiency and simplicity of the hammer by the novel construction and arrangement of the operative parts, as' hereinafter described, and pointed out in the annexed claims.

Referring to the drawings, A denotes the framework by which the operative parts are supported.

A denotes the anvil, and A a reciprocating ham mer-head capable of a vertically-sliding movement in ways A B denotes the helve, which is clamped in a rocking frame B, pivoted at B upon a plate B which is adjustable in vertical ways in the frame 0 by means of an adjusting-screw B, which engages the plate B and is held from longitudinal movement in a bracket 0, attached to the frame 0. The screw B is provided with a hand-wheel B by-which the plate B is raised or lowered. The frame 0 is capable of horizontal adjustment along ways 0 supported by the framework A. The horizontal adjustment of the frame 0 is accomplished by means of an adjusting-screw 0 which engages a lug C projecting from the Serial No. 641.596. (N0 model.)

frame 0 and is held from longitudinal movement in a bracket 0 attached to the framework A. The adjusting-screw O is provided with a hand-wheel C by which the frame 0 is adjusted along ways 0 By means of the adjusting-screws B and C the pivot B of the helve B is capable of being adjusted both vertically and horizontally. The helve B is provided at its front end with a curved arm 13, which supports a sleeve D upon the front side of the hammer-head and in the same horizontal plane as a similarsleeve D, which is supported by a frame D capable of a slight rocking motion upon a pivotal pin D held in the helve B. The frame D is provided with a rack D curved concentrically with the pivotal pin D and engaged by a worm D held in lugs D D projecting from the helve B, The worm D is rotated by a handwheel D in order to rock the frame D and carry the sleeve D toward or away from the sleeve D. An endless strap E is carried around the sleeves D D and passes through an opening A in the hammer-head, forming a flexible connection between the hammerhead A and the helve B. The helve B is provided with springs F Fin the usual manner, which are interposed between the helve and clamping-plates F F which are clamped together by bolts F The plate F is pivotally connected to a link G, which is provided with eccentric-straps G, inclosing an eccentric G on the main driving-shaft G by which a vibrating motion is imparted to the helve B.

One end of the shaft G carries a belt-pulley G", by which power is imparted to the machine by a belt G The belt G is a loose belt, which is tightened when the hammer is operated by means of a tightening pulley H, carried in a frame H, capable of sliding along the inclined ways H attached to the frame A. A flexible connection H connecting the frame H and a fixed eyebolt H, passes over a pulley H to change its direction and beneath a pulley H journaled in arms H which are adjustably attached to a foot-treadle I, pivoted at I to the frame A. When the foottreadle I is depressed, the frame H is drawn up the inclined ways H carrying the pulley H against the belt G, and when the treadle I is released the frame H is moved down the inclined ways H by gravity, thereby loosening the belt. The opposite end of the shaft Gr carries a brake-pulley J, which is inclosed by curved brakearms J J, which are pivoted upon a fixed stud J held in the frame A. The ugper ends of the brake-arms J are provided with lugs J J which are crowded together by spiral springs J J, acting against lugs J J projecting from the side of the frame A, and serving to carry the brake-arms J J against the brake-pulley J. Between the lugs J J is a cam J, capable of a rocking motion on a stud J and provided with an arm J which is connected by a link J with the foot-treadle I. \Vhen the foot-treadle I is depressed for the purpose of tightening the pulley II, the cam J is rocked, thereby separating the lugs J J against the tension of the springs J" and carrying the brake-arms J out of contact with the brakepnlley J. \Vhen the foot-trcadlc I is released, the downward movement of the frame H and tightening-pulley H will raise the treadlc, thereby rocking the can] J and allowing the springs J' to carry the brake-levers J into contact with the brake-pulley J, causing the hammer to be stopped as soon as the driving-belt G is released.

The helve B is clamped in the rocking frame B, which is longitudinally adjustable on the helve, so that the distance between the rocking frame B, and the point at which power is applied to the helve through the connection G can be increased or decreased as desired in order to vary the stroke of the hammer. When it is desired to increase the stroke of the hammer, the rocking frame B is loosened upon the helve and the sliding frame C is moved toward the hammer-head, bringing the fulcrum of the helve nearer to the point at which the power is applied, thereby causing the ham mer-head A to be raised higher at each vibration of the helve, while the movement of the frame C away from the hammer-head increases the leverage of the helve between the fulcrum and the application of power and decreases the stroke of the hammerhead. In case the flexible connection E becomes stretched its slack is taken up by rocking the frame D on its pivot D by means of the rotating worm D in order to carry the sleeve D farther from the sleeve D.

VVh-at I claim as my invention, and desire to secure by Letters Patent, is

1. In a power-ham mer, the combination of a supportirig-framework having ways for a vertical sliding plate, a verticallysliding plate, means for vertically adjusting said plate along said ways, a rocking frame pivoted to said plate, a vibrating helve adj ustably held in said rocking frame, substantially as described.

2. In a power-hammer, the combination with the supporting-framework having horizontal ways, of a frame horizontally adjustable on said ways, said horizontally-adjnstable frame having vertical ways, a plate vertically adjustable in said vertical ways, a frame pivoted to said plate and a helve held in said rocking plate and means for vibrating said helve, substantially as described.

3. In a power-hammer, the combination with a helve B, and rocking frame l5, of a vertically-adj nstable plate l3 ,actuating-screw 13*, said plate and screw being carried upon. a frame (J, a horizontally-adjnstablc frame 0 and an actuating-screw C substantially as described.

4. In a power-hammer, the combination with a hammer-head and itshelve l3 ofa rocking frame I) pivoted upon a plate W, a plate B held in the vertical ways of a frame C, an adj Listing-screw B" by which said plate is raised or lowered in said frame, a frame 0 supported in horizontal ways in the frame work of the machine and an adj Listing-screw C by which said frame is horizontally adjusted, substantially as described.

5. In a power-hammer, the combination with a hammer-head and helve, of a flexible connection, whereby said helve is connected with said hammer-head and consisting of an endless strap A supported upon sleeves D and D, a rocking frame D" supporting the slee e Dand pivoted in the helve B, said rocking frame havinga rack D curved concmitrically with its axis and a worm D snppm-ted upon the helve B and engaging said rack, whereby said frame is rocked in order to vary thetension of the endless strap E, substantially as described.

6. In a power-hammer, the combination with a ham mer-head and its helve, of a driving-shaft operatively connected with said helve, a pulley attached to said shaft and having a belt connection with the driving-pulley, a pivoted foot-treadle, means for tightening the belt connection operatively connected with said foot-treadle, a drum attached to said drivingshaft, a'pair of concentric brakearms pivoted at one end and inclosing said drum, springs applied to the opposite ends of said brake-arms to carry them into contact with the drum, a rocking cam by which the ends of said brake-arms are separated and means for connecting said rocking cam with said foot-treadle, substantially as described.

Dated this 12th day of June, 1897.

RICHARD E. KID DER.

Witnesses:

Burns 13. FOWLER, M. 0. PRICE. 

